Former radio DJ Ray Teret has been jailed for 25 years for a series of rapes and indecent assaults on girls as young as 12.
Teret, 73, a friend of Jimmy Savile, was last week convicted of seven counts of rape and 11 counts of indecent assault during the 1960s and 1970s.
Police revealed four further women have said they were abused by the ex-Radio Caroline DJ in the wake of the trial.
Greater Manchester Police are investigating the claims.
Teret – known as Ugly Ray – was mentored by Savile in the early days of his career. His trial was told he followed Savile “around like a shadow”.